You are a manager of an international chain of hardware stores with locations in Germany, France, Spain, and the UK. So far the chain has gone by a different name in each country. Now you want to define a uniform corporate identity. So you decide to carry out a market study investigating how the colour of the company logo affects the average number of visitors per hour (see files hardware_store.sav and hardware_store.dta).

(a) Which colour would you select?

(b) Which countries have different average numbers of visitors per hour? Base your answer on the results of Scheffé’s method.

(c) Using marginal frequencies, explain why the interaction effect occurs.

(d) Are the requirements satisfied for ANOVA?